/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:47:24,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:47:24,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:47:24,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:47:24,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:47:24,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:47:24,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:47:24,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:47:24,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:47:24,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:47:24,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:47:24,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:47:24,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:47:24,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:47:24,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:47:24,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:47:24,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:47:24,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:47:24,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:47:24,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:47:24,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:47:24,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:47:24,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:47:24,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:47:24,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:47:24,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:47:24,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:47:24,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:47:24,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:47:24,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:47:24,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:47:24,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:47:24,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:47:24,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:47:24,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:47:24,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:47:24,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:47:24,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:47:24,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:47:24,177 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:47:24,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:47:24,177 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:47:24,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:47:24,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:47:24,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:47:24,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:47:24,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:47:24,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:47:24,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:47:24,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:47:24,179 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:47:24,179 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:47:24,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:47:24,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:47:24,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:47:24,458 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:47:24,458 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:47:24,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c [2021-05-02 20:47:24,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0511f8e46/a8a1ce47fe204a65b8a754286f950fec/FLAG819fb0926 [2021-05-02 20:47:25,151 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:47:25,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c [2021-05-02 20:47:25,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0511f8e46/a8a1ce47fe204a65b8a754286f950fec/FLAG819fb0926 [2021-05-02 20:47:25,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0511f8e46/a8a1ce47fe204a65b8a754286f950fec [2021-05-02 20:47:25,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:47:25,550 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:47:25,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:47:25,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:47:25,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:47:25,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39eeeca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25, skipping insertion in model container [2021-05-02 20:47:25,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:47:25,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:47:25,649 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c[524,537] [2021-05-02 20:47:25,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:47:25,663 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:47:25,670 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c[524,537] [2021-05-02 20:47:25,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:47:25,683 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:47:25,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25 WrapperNode [2021-05-02 20:47:25,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:47:25,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:47:25,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:47:25,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:47:25,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:25,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:47:25,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:47:25,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:47:25,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:47:25,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:47:25,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:47:25,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:47:25,787 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:47:25,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:47:25,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:47:25,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:47:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:47:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:47:25,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:47:25,982 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:47:25,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:47:25 BoogieIcfgContainer [2021-05-02 20:47:25,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:47:25,983 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:47:25,983 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:47:25,984 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:47:25,985 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:47:25" (1/1) ... [2021-05-02 20:47:26,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:47:26 BasicIcfg [2021-05-02 20:47:26,013 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:47:26,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:47:26,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:47:26,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:47:26,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:47:25" (1/4) ... [2021-05-02 20:47:26,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358952ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:47:26, skipping insertion in model container [2021-05-02 20:47:26,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:25" (2/4) ... [2021-05-02 20:47:26,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358952ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:47:26, skipping insertion in model container [2021-05-02 20:47:26,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:47:25" (3/4) ... [2021-05-02 20:47:26,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358952ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:47:26, skipping insertion in model container [2021-05-02 20:47:26,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:47:26" (4/4) ... [2021-05-02 20:47:26,017 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound5.cJordan [2021-05-02 20:47:26,020 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:47:26,034 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:47:26,043 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:47:26,070 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:47:26,070 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:47:26,070 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:47:26,070 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:47:26,070 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:47:26,070 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:47:26,070 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:47:26,070 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:47:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:47:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:47:26,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:26,100 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:26,100 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:26,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1450325676, now seen corresponding path program 1 times [2021-05-02 20:47:26,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:26,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665321672] [2021-05-02 20:47:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:26,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:47:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:26,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:47:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:26,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:47:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:26,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:47:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:26,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:47:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:47:26,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:26,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665321672] [2021-05-02 20:47:26,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665321672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:47:26,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:47:26,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:47:26,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651664109] [2021-05-02 20:47:26,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:47:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:47:26,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:47:26,350 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:47:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:26,409 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 20:47:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:47:26,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:47:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:26,415 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:47:26,415 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:47:26,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:47:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:47:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:47:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:47:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 20:47:26,441 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 20:47:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:26,441 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 20:47:26,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:47:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 20:47:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:47:26,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:26,443 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:26,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:47:26,444 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 512475503, now seen corresponding path program 1 times [2021-05-02 20:47:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:26,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039272397] [2021-05-02 20:47:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:26,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:26,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424484524] [2021-05-02 20:47:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:47:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:26,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:47:26,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:26,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039272397] [2021-05-02 20:47:26,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:26,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424484524] [2021-05-02 20:47:26,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424484524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:26,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:26,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:47:26,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160205278] [2021-05-02 20:47:26,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:47:26,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:26,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:47:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:47:26,845 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:47:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:26,936 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-02 20:47:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:47:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:47:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:26,938 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:47:26,938 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:47:26,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:47:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:47:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:47:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:47:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 20:47:26,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2021-05-02 20:47:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:26,953 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 20:47:26,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:47:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 20:47:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:47:26,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:26,954 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:27,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:47:27,171 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash -397056057, now seen corresponding path program 1 times [2021-05-02 20:47:27,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:27,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436121458] [2021-05-02 20:47:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:27,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:27,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623615951] [2021-05-02 20:47:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:47:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:27,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:47:27,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436121458] [2021-05-02 20:47:27,414 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623615951] [2021-05-02 20:47:27,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623615951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:27,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:27,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:47:27,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450468654] [2021-05-02 20:47:27,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:47:27,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:27,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:47:27,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:47:27,415 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:47:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:45,511 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-05-02 20:47:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:47:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:47:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:45,512 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:47:45,512 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:47:45,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:47:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:47:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:47:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:47:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 20:47:45,515 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 39 [2021-05-02 20:47:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:45,515 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 20:47:45,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:47:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 20:47:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:47:45,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:45,516 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:45,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:45,717 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:45,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:45,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1822507357, now seen corresponding path program 1 times [2021-05-02 20:47:45,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:45,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386417212] [2021-05-02 20:47:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:45,725 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:45,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828802092] [2021-05-02 20:47:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:47:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:45,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:47:45,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:45,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386417212] [2021-05-02 20:47:45,978 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:45,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828802092] [2021-05-02 20:47:45,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828802092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:45,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:45,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:47:45,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136283084] [2021-05-02 20:47:45,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:47:45,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:47:45,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:47:45,979 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:47:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:51,097 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-02 20:47:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:47:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 20:47:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:51,099 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:47:51,099 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:47:51,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:47:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:47:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-05-02 20:47:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:47:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-05-02 20:47:51,103 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 41 [2021-05-02 20:47:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:51,103 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-05-02 20:47:51,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:47:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-05-02 20:47:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:47:51,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:51,106 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:51,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:51,322 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:51,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1603865781, now seen corresponding path program 2 times [2021-05-02 20:47:51,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:51,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303457517] [2021-05-02 20:47:51,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:51,334 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:51,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149667936] [2021-05-02 20:47:51,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:51,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:47:51,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:47:51,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:47:51,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:51,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:47:51,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303457517] [2021-05-02 20:47:51,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149667936] [2021-05-02 20:47:51,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149667936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:51,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:51,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:47:51,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12458436] [2021-05-02 20:47:51,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:47:51,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:47:51,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:47:51,695 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:47:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:53,941 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-02 20:47:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:47:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 20:47:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:53,942 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:47:53,942 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:47:53,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:47:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:47:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-05-02 20:47:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:47:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 20:47:53,948 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 49 [2021-05-02 20:47:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:53,948 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 20:47:53,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:47:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 20:47:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 20:47:53,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:53,949 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:54,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:54,161 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:54,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1737152313, now seen corresponding path program 3 times [2021-05-02 20:47:54,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:54,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380880403] [2021-05-02 20:47:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:54,169 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:54,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787096888] [2021-05-02 20:47:54,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:54,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:47:54,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:47:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:47:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:54,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:54,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 20:47:54,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380880403] [2021-05-02 20:47:54,308 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787096888] [2021-05-02 20:47:54,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787096888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:54,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:54,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:47:54,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199116422] [2021-05-02 20:47:54,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:47:54,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:54,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:47:54,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:47:54,310 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:47:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:58,375 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-05-02 20:47:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:47:58,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-05-02 20:47:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:58,376 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:47:58,376 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:47:58,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:47:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:47:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-05-02 20:47:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:47:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 20:47:58,381 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 57 [2021-05-02 20:47:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:58,382 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 20:47:58,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:47:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 20:47:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:47:58,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:58,383 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:58,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:47:58,583 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:58,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash -479214138, now seen corresponding path program 1 times [2021-05-02 20:47:58,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:58,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299714338] [2021-05-02 20:47:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:58,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:58,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423928226] [2021-05-02 20:47:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:47:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:58,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,087 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 20:47:59,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-05-02 20:47:59,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:59,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299714338] [2021-05-02 20:47:59,729 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:59,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423928226] [2021-05-02 20:47:59,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423928226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:59,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:59,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:47:59,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794394454] [2021-05-02 20:47:59,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:47:59,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:47:59,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:47:59,730 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 20:48:01,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:48:01,293 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-05-02 20:48:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:48:01,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2021-05-02 20:48:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:48:01,294 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:48:01,294 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:48:01,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:48:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:48:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:48:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:48:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-05-02 20:48:01,300 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 65 [2021-05-02 20:48:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:48:01,300 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-05-02 20:48:01,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 20:48:01,300 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-05-02 20:48:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:48:01,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:48:01,301 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:48:01,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:01,502 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:48:01,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:48:01,502 INFO L82 PathProgramCache]: Analyzing trace with hash 685754451, now seen corresponding path program 2 times [2021-05-02 20:48:01,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:48:01,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178135743] [2021-05-02 20:48:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:48:01,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:48:01,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610693185] [2021-05-02 20:48:01,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:01,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:48:01,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:48:01,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 20:48:01,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:48:01,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:01,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:01,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:01,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:01,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:01,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:20,442 WARN L205 SmtUtils]: Spent 18.80 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-02 20:48:31,134 WARN L205 SmtUtils]: Spent 10.68 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:48:31,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:39,361 WARN L205 SmtUtils]: Spent 8.15 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 20:48:39,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:39,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:39,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:39,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:41,472 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-02 20:48:41,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:41,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:47,614 WARN L205 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-02 20:48:53,834 WARN L205 SmtUtils]: Spent 6.08 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 20:48:53,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:53,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:20,608 WARN L205 SmtUtils]: Spent 23.73 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-05-02 20:49:20,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:20,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:22,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:11,696 WARN L205 SmtUtils]: Spent 45.75 s on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-05-02 20:50:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 20:50:22,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:22,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178135743] [2021-05-02 20:50:22,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:22,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610693185] [2021-05-02 20:50:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610693185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:22,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:22,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:50:22,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938586723] [2021-05-02 20:50:22,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:50:22,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:22,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:50:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=198, Unknown=1, NotChecked=0, Total=240 [2021-05-02 20:50:22,972 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 20:50:28,720 WARN L205 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 20:50:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:50,597 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2021-05-02 20:50:50,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:50:50,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 73 [2021-05-02 20:50:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:50,599 INFO L225 Difference]: With dead ends: 84 [2021-05-02 20:50:50,599 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 20:50:50,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 144230.1ms TimeCoverageRelationStatistics Valid=67, Invalid=352, Unknown=1, NotChecked=0, Total=420 [2021-05-02 20:50:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 20:50:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2021-05-02 20:50:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 44 states have internal predecessors, (49), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:50:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-05-02 20:50:50,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 73 [2021-05-02 20:50:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:50,604 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-05-02 20:50:50,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 20:50:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-05-02 20:50:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:50:50,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:50,605 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:50,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:50,806 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:50,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1559840429, now seen corresponding path program 3 times [2021-05-02 20:50:50,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:50,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105795526] [2021-05-02 20:50:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:50,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:50,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560499731] [2021-05-02 20:50:50,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:50,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:50:50,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:50:50,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:50,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:50,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:50,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:50,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:50,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:51,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:51,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:50:51,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:51,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105795526] [2021-05-02 20:50:51,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:51,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560499731] [2021-05-02 20:50:51,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560499731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:51,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:51,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:50:51,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309864613] [2021-05-02 20:50:51,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:50:51,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:51,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:50:51,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:50:51,117 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:50:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:55,307 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-02 20:50:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:50:55,308 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-05-02 20:50:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:55,308 INFO L225 Difference]: With dead ends: 78 [2021-05-02 20:50:55,308 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:50:55,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:50:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:50:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:50:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:50:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:50:55,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-05-02 20:50:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:55,309 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:50:55,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:50:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:50:55,309 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:50:55,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:50:55,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:50:55 BasicIcfg [2021-05-02 20:50:55,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:50:55,513 INFO L168 Benchmark]: Toolchain (without parser) took 209967.19 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 132.0 MB in the beginning and 157.1 MB in the end (delta: -25.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:55,514 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 167.8 MB. Free memory is still 148.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:50:55,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 131.93 ms. Allocated memory is still 167.8 MB. Free memory was 131.8 MB in the beginning and 122.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:55,514 INFO L168 Benchmark]: Boogie Preprocessor took 61.57 ms. Allocated memory is still 167.8 MB. Free memory was 121.9 MB in the beginning and 149.9 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:55,514 INFO L168 Benchmark]: RCFGBuilder took 237.28 ms. Allocated memory is still 167.8 MB. Free memory was 149.9 MB in the beginning and 135.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:55,514 INFO L168 Benchmark]: IcfgTransformer took 29.25 ms. Allocated memory is still 167.8 MB. Free memory was 135.2 MB in the beginning and 133.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:55,514 INFO L168 Benchmark]: TraceAbstraction took 209499.60 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 133.5 MB in the beginning and 157.1 MB in the end (delta: -23.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:55,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 167.8 MB. Free memory is still 148.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 131.93 ms. Allocated memory is still 167.8 MB. Free memory was 131.8 MB in the beginning and 122.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.57 ms. Allocated memory is still 167.8 MB. Free memory was 121.9 MB in the beginning and 149.9 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 237.28 ms. Allocated memory is still 167.8 MB. Free memory was 149.9 MB in the beginning and 135.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.25 ms. Allocated memory is still 167.8 MB. Free memory was 135.2 MB in the beginning and 133.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 209499.60 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 133.5 MB in the beginning and 157.1 MB in the end (delta: -23.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 209441.7ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 30.5ms, AutomataDifference: 63089.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 214 SDtfs, 161 SDslu, 1099 SDs, 0 SdLazy, 1141 SolverSat, 72 SolverUnsat, 23 SolverUnknown, 0 SolverNotchecked, 56747.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 464 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 145656.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=7, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 41 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 63.0ms SsaConstructionTime, 272.1ms SatisfiabilityAnalysisTime, 143877.5ms InterpolantComputationTime, 463 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 454 ConstructedInterpolants, 12 QuantifiedInterpolants, 4349 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 216 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 421/538 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...