/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:49:36,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:49:36,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:49:36,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:49:36,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:49:36,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:49:36,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:49:36,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:49:36,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:49:36,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:49:36,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:49:36,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:49:36,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:49:36,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:49:36,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:49:36,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:49:36,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:49:36,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:49:36,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:49:36,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:49:36,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:49:36,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:49:36,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:49:36,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:49:36,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:49:36,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:49:36,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:49:36,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:49:36,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:49:36,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:49:36,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:49:36,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:49:36,119 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:49:36,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:49:36,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:49:36,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:49:36,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:49:36,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:49:36,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:49:36,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:49:36,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:49:36,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:49:36,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:49:36,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:49:36,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:49:36,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:49:36,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:49:36,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:49:36,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:49:36,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:49:36,122 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:49:36,122 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:49:36,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:49:36,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:49:36,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:49:36,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:49:36,393 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:49:36,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-05-02 22:49:36,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba22db68/83612dbc74364c4d9defac02904f90e0/FLAG9f1104678 [2021-05-02 22:49:36,842 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:49:36,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-05-02 22:49:36,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba22db68/83612dbc74364c4d9defac02904f90e0/FLAG9f1104678 [2021-05-02 22:49:36,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba22db68/83612dbc74364c4d9defac02904f90e0 [2021-05-02 22:49:36,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:49:36,866 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:49:36,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:49:36,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:49:36,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:49:36,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:49:36" (1/1) ... [2021-05-02 22:49:36,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f80434c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:36, skipping insertion in model container [2021-05-02 22:49:36,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:49:36" (1/1) ... [2021-05-02 22:49:36,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:49:36,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:49:37,068 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2021-05-02 22:49:37,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:49:37,091 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:49:37,117 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2021-05-02 22:49:37,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:49:37,141 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:49:37,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37 WrapperNode [2021-05-02 22:49:37,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:49:37,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:49:37,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:49:37,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:49:37,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (1/1) ... [2021-05-02 22:49:37,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (1/1) ... [2021-05-02 22:49:37,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (1/1) ... [2021-05-02 22:49:37,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (1/1) ... [2021-05-02 22:49:37,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (1/1) ... [2021-05-02 22:49:37,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (1/1) ... [2021-05-02 22:49:37,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (1/1) ... [2021-05-02 22:49:37,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:49:37,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:49:37,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:49:37,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:49:37,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:49:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:49:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:49:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:49:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:49:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:49:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:49:37,269 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:49:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:49:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:49:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:49:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:49:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:49:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:49:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:49:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:49:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:49:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:49:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:49:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:49:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:49:37,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:49:37,463 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:49:37,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:49:37 BoogieIcfgContainer [2021-05-02 22:49:37,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:49:37,465 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:49:37,465 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:49:37,466 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:49:37,467 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:49:37" (1/1) ... [2021-05-02 22:49:37,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:49:37 BasicIcfg [2021-05-02 22:49:37,478 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:49:37,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:49:37,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:49:37,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:49:37,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:49:36" (1/4) ... [2021-05-02 22:49:37,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a186f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:49:37, skipping insertion in model container [2021-05-02 22:49:37,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:49:37" (2/4) ... [2021-05-02 22:49:37,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a186f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:49:37, skipping insertion in model container [2021-05-02 22:49:37,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:49:37" (3/4) ... [2021-05-02 22:49:37,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a186f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:49:37, skipping insertion in model container [2021-05-02 22:49:37,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:49:37" (4/4) ... [2021-05-02 22:49:37,483 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.cJordan [2021-05-02 22:49:37,487 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:49:37,490 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:49:37,521 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:49:37,544 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:49:37,545 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:49:37,545 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:49:37,545 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:49:37,545 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:49:37,545 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:49:37,545 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:49:37,545 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:49:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:49:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:49:37,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:37,558 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:37,558 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-02 22:49:37,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:37,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723490996] [2021-05-02 22:49:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:37,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:49:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:49:37,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723490996] [2021-05-02 22:49:37,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723490996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:49:37,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:49:37,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:49:37,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242740127] [2021-05-02 22:49:37,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:49:37,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:37,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:49:37,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:49:37,806 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:49:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:37,872 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-02 22:49:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:49:37,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:49:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:37,878 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:49:37,879 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:49:37,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:49:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:49:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 22:49:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:49:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-02 22:49:37,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-02 22:49:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:37,901 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-02 22:49:37,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:49:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-02 22:49:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:49:37,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:37,902 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:37,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:49:37,902 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:37,903 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-02 22:49:37,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:37,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618902650] [2021-05-02 22:49:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:38,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:49:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:49:38,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:38,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618902650] [2021-05-02 22:49:38,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618902650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:49:38,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:49:38,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:49:38,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447933058] [2021-05-02 22:49:38,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:49:38,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:38,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:49:38,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:49:38,024 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:49:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:38,127 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-02 22:49:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:49:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:49:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:38,129 INFO L225 Difference]: With dead ends: 23 [2021-05-02 22:49:38,130 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 22:49:38,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:49:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 22:49:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 22:49:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:49:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-02 22:49:38,137 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-02 22:49:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:38,137 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-02 22:49:38,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:49:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-02 22:49:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:49:38,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:38,139 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:38,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:49:38,139 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:38,140 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-02 22:49:38,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:38,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234013010] [2021-05-02 22:49:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:38,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:49:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:49:38,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:38,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234013010] [2021-05-02 22:49:38,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234013010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:49:38,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:49:38,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:49:38,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981845378] [2021-05-02 22:49:38,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:49:38,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:49:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:49:38,246 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:49:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:38,479 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-02 22:49:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:49:38,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:49:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:38,481 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:49:38,481 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:49:38,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:49:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:49:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 22:49:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:49:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 22:49:38,495 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 22:49:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:38,496 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 22:49:38,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:49:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 22:49:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:49:38,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:38,497 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:38,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 22:49:38,497 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:38,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:38,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2021-05-02 22:49:38,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:38,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204275720] [2021-05-02 22:49:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:38,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:38,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693704999] [2021-05-02 22:49:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:49:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:49:38,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:38,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204275720] [2021-05-02 22:49:38,839 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:38,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693704999] [2021-05-02 22:49:38,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693704999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:38,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:38,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:49:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41547173] [2021-05-02 22:49:38,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:49:38,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:49:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:49:38,841 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:49:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:38,927 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:49:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:49:38,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 22:49:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:38,928 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:49:38,928 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:49:38,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:49:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:49:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:49:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:49:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 22:49:38,932 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2021-05-02 22:49:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:38,932 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 22:49:38,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:49:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 22:49:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:49:38,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:38,933 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:39,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:39,141 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:39,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2021-05-02 22:49:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:39,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94358125] [2021-05-02 22:49:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:39,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:39,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083808056] [2021-05-02 22:49:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:49:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:39,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:39,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:39,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:39,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:39,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:39,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:39,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:49:39,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94358125] [2021-05-02 22:49:39,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083808056] [2021-05-02 22:49:39,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083808056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:39,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:39,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:49:39,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955697503] [2021-05-02 22:49:39,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:49:39,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:39,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:49:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:49:39,349 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:49:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:39,396 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 22:49:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:49:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 22:49:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:39,400 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:49:39,400 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 22:49:39,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:49:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 22:49:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 22:49:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:49:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 22:49:39,403 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 30 [2021-05-02 22:49:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:39,403 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 22:49:39,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:49:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 22:49:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:49:39,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:39,404 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:39,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:39,605 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2021-05-02 22:49:39,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:39,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667434313] [2021-05-02 22:49:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:39,620 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:39,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631609205] [2021-05-02 22:49:39,621 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 22:49:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:39,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:49:39,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:49:39,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:39,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667434313] [2021-05-02 22:49:39,769 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:39,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631609205] [2021-05-02 22:49:39,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631609205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:39,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:39,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:49:39,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127814121] [2021-05-02 22:49:39,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:49:39,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:49:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:49:39,771 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:49:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:39,819 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-02 22:49:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:49:39,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 22:49:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:39,821 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:49:39,821 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:49:39,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:49:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:49:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:49:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:49:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-05-02 22:49:39,831 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 30 [2021-05-02 22:49:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:39,831 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-05-02 22:49:39,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:49:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-05-02 22:49:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 22:49:39,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:39,833 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:40,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:40,055 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2021-05-02 22:49:40,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:40,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184760536] [2021-05-02 22:49:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:40,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:40,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083831755] [2021-05-02 22:49:40,061 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 22:49:40,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:49:40,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:49:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:49:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:40,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:49:40,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:40,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184760536] [2021-05-02 22:49:40,253 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:40,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083831755] [2021-05-02 22:49:40,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083831755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:40,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:40,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:49:40,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238517271] [2021-05-02 22:49:40,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:49:40,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:49:40,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:49:40,255 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:49:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:40,395 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-02 22:49:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:49:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 22:49:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:40,396 INFO L225 Difference]: With dead ends: 52 [2021-05-02 22:49:40,396 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:49:40,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:49:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:49:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:49:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:49:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 22:49:40,399 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-05-02 22:49:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:40,399 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 22:49:40,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:49:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 22:49:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:49:40,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:40,400 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:40,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:40,601 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:40,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2014164963, now seen corresponding path program 2 times [2021-05-02 22:49:40,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:40,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065274077] [2021-05-02 22:49:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:40,609 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:40,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837768130] [2021-05-02 22:49:40,610 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:40,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:49:40,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:49:40,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:49:40,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:40,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 22:49:40,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065274077] [2021-05-02 22:49:40,737 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837768130] [2021-05-02 22:49:40,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837768130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:40,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:40,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:49:40,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790396766] [2021-05-02 22:49:40,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:49:40,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:40,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:49:40,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:49:40,739 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:49:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:40,779 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-02 22:49:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:49:40,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-02 22:49:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:40,794 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:49:40,794 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:49:40,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:49:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:49:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 22:49:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:49:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-05-02 22:49:40,797 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2021-05-02 22:49:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:40,797 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-05-02 22:49:40,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:49:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-05-02 22:49:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:49:40,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:40,798 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:41,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:41,014 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2015237439, now seen corresponding path program 3 times [2021-05-02 22:49:41,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:41,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869583354] [2021-05-02 22:49:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:41,021 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:41,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385013325] [2021-05-02 22:49:41,021 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:41,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:49:41,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:49:41,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:49:41,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:49:41,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:41,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869583354] [2021-05-02 22:49:41,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:41,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385013325] [2021-05-02 22:49:41,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385013325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:41,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:41,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:49:41,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292297362] [2021-05-02 22:49:41,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:49:41,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:41,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:49:41,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:49:41,210 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:49:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:41,270 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 22:49:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:49:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-02 22:49:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:41,271 INFO L225 Difference]: With dead ends: 62 [2021-05-02 22:49:41,271 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 22:49:41,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:49:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 22:49:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-05-02 22:49:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:49:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-05-02 22:49:41,275 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 48 [2021-05-02 22:49:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:41,275 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-05-02 22:49:41,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:49:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-05-02 22:49:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 22:49:41,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:41,276 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:41,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:41,477 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1772710271, now seen corresponding path program 4 times [2021-05-02 22:49:41,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:41,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901256328] [2021-05-02 22:49:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:41,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:41,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787910660] [2021-05-02 22:49:41,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:41,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:49:41,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:49:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:49:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:41,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:41,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 22:49:41,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:41,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901256328] [2021-05-02 22:49:41,667 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:41,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787910660] [2021-05-02 22:49:41,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787910660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:41,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:41,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:49:41,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464504514] [2021-05-02 22:49:41,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:49:41,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:41,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:49:41,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:49:41,672 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:49:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:49,169 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-05-02 22:49:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:49:49,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-02 22:49:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:49,170 INFO L225 Difference]: With dead ends: 64 [2021-05-02 22:49:49,170 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 22:49:49,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:49:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 22:49:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-02 22:49:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:49:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-05-02 22:49:49,174 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 53 [2021-05-02 22:49:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:49,175 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-05-02 22:49:49,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:49:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-05-02 22:49:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 22:49:49,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:49,176 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:49,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:49:49,394 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:49,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1316272605, now seen corresponding path program 1 times [2021-05-02 22:49:49,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:49,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666615508] [2021-05-02 22:49:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:49,399 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:49,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727234490] [2021-05-02 22:49:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:49,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 22:49:49,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:49,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:49,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:49,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 22:49:49,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666615508] [2021-05-02 22:49:49,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727234490] [2021-05-02 22:49:49,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727234490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:49,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:49,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:49:49,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497784982] [2021-05-02 22:49:49,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:49:49,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:49:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:49:49,632 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 22:49:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:53,651 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-05-02 22:49:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:49:53,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-05-02 22:49:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:53,652 INFO L225 Difference]: With dead ends: 71 [2021-05-02 22:49:53,652 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 22:49:53,652 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:49:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 22:49:53,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-05-02 22:49:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 15 states have call successors, (15), 10 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:49:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-05-02 22:49:53,656 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 74 [2021-05-02 22:49:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:53,657 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-05-02 22:49:53,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 22:49:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-05-02 22:49:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 22:49:53,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:53,657 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:53,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 22:49:53,865 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1842005024, now seen corresponding path program 1 times [2021-05-02 22:49:53,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:53,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521030170] [2021-05-02 22:49:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:53,883 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:53,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203094686] [2021-05-02 22:49:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:49:53,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 22:49:53,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:53,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:53,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:53,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:53,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:53,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:53,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:53,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:53,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:53,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 90 proven. 132 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 22:49:54,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:54,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521030170] [2021-05-02 22:49:54,079 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:54,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203094686] [2021-05-02 22:49:54,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203094686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:54,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:54,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:49:54,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420501154] [2021-05-02 22:49:54,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:49:54,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:54,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:49:54,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:49:54,081 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:49:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:54,133 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-05-02 22:49:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:49:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-02 22:49:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:54,134 INFO L225 Difference]: With dead ends: 71 [2021-05-02 22:49:54,135 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 22:49:54,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:49:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 22:49:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 22:49:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 17 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:49:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-05-02 22:49:54,139 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 76 [2021-05-02 22:49:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:54,140 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-05-02 22:49:54,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:49:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-05-02 22:49:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 22:49:54,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:54,144 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:54,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:54,349 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1541294431, now seen corresponding path program 2 times [2021-05-02 22:49:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:54,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928419982] [2021-05-02 22:49:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:54,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:54,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638529151] [2021-05-02 22:49:54,356 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:54,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:49:54,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:49:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 22:49:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:54,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 22:49:54,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:49:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928419982] [2021-05-02 22:49:54,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:49:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638529151] [2021-05-02 22:49:54,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638529151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:49:54,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:49:54,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:49:54,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069516809] [2021-05-02 22:49:54,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:49:54,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:49:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:49:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:49:54,560 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 22:49:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:49:54,635 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-05-02 22:49:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:49:54,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 94 [2021-05-02 22:49:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:49:54,636 INFO L225 Difference]: With dead ends: 81 [2021-05-02 22:49:54,636 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 22:49:54,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:49:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 22:49:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 22:49:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 20 states have call successors, (20), 12 states have call predecessors, (20), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:49:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-05-02 22:49:54,639 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 94 [2021-05-02 22:49:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:49:54,640 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-05-02 22:49:54,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 22:49:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-05-02 22:49:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 22:49:54,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:49:54,657 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:49:54,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:54,857 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:49:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:49:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 753442014, now seen corresponding path program 3 times [2021-05-02 22:49:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:49:54,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084796506] [2021-05-02 22:49:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:49:54,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:49:54,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498179089] [2021-05-02 22:49:54,863 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:49:54,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:49:54,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:49:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 22:49:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:49:55,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:49:55,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:05,180 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 22:50:05,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:05,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 171 proven. 3 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2021-05-02 22:50:05,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:05,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084796506] [2021-05-02 22:50:05,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:05,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498179089] [2021-05-02 22:50:05,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498179089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:05,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:05,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:50:05,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661686296] [2021-05-02 22:50:05,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:50:05,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:05,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:50:05,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2021-05-02 22:50:05,216 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:50:14,503 WARN L205 SmtUtils]: Spent 9.25 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 22:50:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:41,920 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-05-02 22:50:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:50:41,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 112 [2021-05-02 22:50:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:41,921 INFO L225 Difference]: With dead ends: 95 [2021-05-02 22:50:41,921 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:50:41,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 19391.2ms TimeCoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2021-05-02 22:50:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:50:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:50:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 22:50:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:50:41,922 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2021-05-02 22:50:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:41,922 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:50:41,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:50:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:50:41,922 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:50:42,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 22:50:42,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:50:42 BasicIcfg [2021-05-02 22:50:42,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:50:42,133 INFO L168 Benchmark]: Toolchain (without parser) took 65267.57 ms. Allocated memory was 190.8 MB in the beginning and 230.7 MB in the end (delta: 39.8 MB). Free memory was 155.6 MB in the beginning and 119.4 MB in the end (delta: 36.2 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:42,133 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:50:42,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.62 ms. Allocated memory is still 190.8 MB. Free memory was 155.5 MB in the beginning and 170.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:42,134 INFO L168 Benchmark]: Boogie Preprocessor took 60.86 ms. Allocated memory is still 190.8 MB. Free memory was 170.5 MB in the beginning and 174.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:42,134 INFO L168 Benchmark]: RCFGBuilder took 259.08 ms. Allocated memory is still 190.8 MB. Free memory was 174.1 MB in the beginning and 159.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:42,134 INFO L168 Benchmark]: IcfgTransformer took 13.21 ms. Allocated memory is still 190.8 MB. Free memory was 159.4 MB in the beginning and 157.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:42,134 INFO L168 Benchmark]: TraceAbstraction took 64653.63 ms. Allocated memory was 190.8 MB in the beginning and 230.7 MB in the end (delta: 39.8 MB). Free memory was 157.8 MB in the beginning and 119.4 MB in the end (delta: 38.4 MB). Peak memory consumption was 79.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:42,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.62 ms. Allocated memory is still 190.8 MB. Free memory was 155.5 MB in the beginning and 170.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.86 ms. Allocated memory is still 190.8 MB. Free memory was 170.5 MB in the beginning and 174.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 259.08 ms. Allocated memory is still 190.8 MB. Free memory was 174.1 MB in the beginning and 159.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.21 ms. Allocated memory is still 190.8 MB. Free memory was 159.4 MB in the beginning and 157.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 64653.63 ms. Allocated memory was 190.8 MB in the beginning and 230.7 MB in the end (delta: 39.8 MB). Free memory was 157.8 MB in the beginning and 119.4 MB in the end (delta: 38.4 MB). Peak memory consumption was 79.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 64586.2ms, OverallIterations: 14, TraceHistogramMax: 18, EmptinessCheckTime: 35.0ms, AutomataDifference: 49238.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 377 SDtfs, 126 SDslu, 1055 SDs, 0 SdLazy, 803 SolverSat, 118 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 39259.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 653 GetRequests, 555 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 19973.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=13, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 74.2ms AutomataMinimizationTime, 14 MinimizatonAttempts, 10 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 114.4ms SsaConstructionTime, 358.0ms SatisfiabilityAnalysisTime, 11933.6ms InterpolantComputationTime, 652 NumberOfCodeBlocks, 566 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 638 ConstructedInterpolants, 0 QuantifiedInterpolants, 1833 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1967 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 1461/1967 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...